You can't confirm the father of an unborn child, but once the baby is born a paternity test can be done
Depending on the jurisdiction, the biological father has certain rights. You should hire an attorney.
Yes. The father has no right to go to a personal doctors appointment.
No, a father smoking marijuana will not hurt an unborn child. The mother should do her best to stay out of the room, but the father smoking will not hurt.
you have to ask the doctor
DNA tests are almost always an absolute indicator of the paternity of children. In very rare cases (chimera), involving the ovaries of unborn fraternal twins, DNA testing will also correctly indicate that the birth mother is not the biological mother.
Absolutely.
No. The father of the pregnant daughter has no legal obligation to support her child. That responsibility belongs to the biological father of the unborn child assuming that the pregnancy is not terminated nor the child placed for adoption or parental rights terminated by the court.
There should be a paternity test just to clarify things, than it can be done using a mediator. see links below
no
get married
By getting an ultrasound from a doctor.
Unborn babies react to the sound of their father's voice, in the womb, and after birth will turn to their father's voice over another man's voice. There is no way for a fetus to know that a specific male voice belongs to the biological father. It is more likely that, after birth, the male voice that is heard most often by the baby and that becomes associated with pleasure (feeding, being picked up, etc.) will contribute to the initial bonding that occurs, and that will strengthen over time, between baby and father. Later, visual cues will add further strength to the original bonding.